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A comparative study on monitoring of bioactive compound production/degradation, volatile substances, and oxidation indices during horn and bath high-power ultrasound-assisted oil bleaching. | LitMetric

AI Article Synopsis

  • This research compared the effects of two ultrasonic bleaching methods (bath and horn) on sunflower oil regarding degradation of beneficial compounds like tocopherols and sterols, as well as oxidation levels.
  • The study found that both ultrasound methods led to greater reductions in these compounds compared to traditional bleaching methods, with the horn technique proving more effective.
  • Despite having lower power output, the horn sonicator caused higher degradation of nutrients and increased oxidation indices, indicating a more pronounced impact on oil quality when compared to bath sonication and conventional bleaching.

Article Abstract

This research aimed to investigate and compare the effect of bath and horn ultrasound-assisted bleaching of sunflower oilon the degradation of tocopherols and sterols, production of volatile substances, and oxidation indices, including thiobarbituric acid (TBA) and peroxide value (PV) and with that of the industrial bleaching process. Ultrasonic bath and ultrasonic horn bleaching techniques reduced sunflower oil's total tocopherol and total sterol contents to a greater extent than conventional bleaching techniques. While bath and horn sonication operated theoretically equivalent power settings, power meter measurements demonstrated that the bath sonicator delivered significantly less power than the horn sonicator. Among the ultrasonic bleaching techniques, the ultrasonic bath at 400 W showed the lowest reduction in total tocopherols,sterols and volatile compounds compared to the ultrasonic horn technique at the same theoritical power. Moreover, Despite the 800 W bath sonicator having significantly higher nominal power than the 400 W horn sonicator, the horn sonicator was considerably more effective at degrading bioactive compounds. Higher degradation of bioactive compounds coincided with increasing patterns in primary and secondary oxidation indices and volatile compounds in horn compared to bath and industrial bleaching due to the direct effect of ultrasonic horn and free radical formations.

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Source
http://dx.doi.org/10.1016/j.ultsonch.2024.107184DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11647650PMC

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